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AC/DC & DC/DC controllers (external FET)

UCC2897A

ACTIVO

Controlador PWM de 110 V con modo de corriente de pinza activa y protección FET de pinza de canal P

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UCC2897A

ACTIVO
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Detalles del producto

Vin (max) (V) 16 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Duty cycle (max) (%) 74
Vin (max) (V) 16 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Duty cycle (max) (%) 74
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4 VQFN (RGP) 20 16 mm² 4 x 4
  • Low-output jitter
  • Soft-stop shutdown of MAIN and AUX
  • 110-V input startup function
  • Ideal for active-clamp, reset-forward, flyback and synchronous rectifier uses
  • Provides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switches
  • Peak current-mode control with 0.5-V cycle-by-cycle current limiting
  • TrueDrive™ 2-A Sink, 2-A source outputs
  • Trimmed internal-bandgap reference for accurate line UV and line OV threshold
  • Programmable slope compensation
  • High-performance 1-MHz synchronizable oscillator with internal timing capacitor
  • Precise programmable maximum duty cycle
  • PB-free lead finish package
  • Low-output jitter
  • Soft-stop shutdown of MAIN and AUX
  • 110-V input startup function
  • Ideal for active-clamp, reset-forward, flyback and synchronous rectifier uses
  • Provides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switches
  • Peak current-mode control with 0.5-V cycle-by-cycle current limiting
  • TrueDrive™ 2-A Sink, 2-A source outputs
  • Trimmed internal-bandgap reference for accurate line UV and line OV threshold
  • Programmable slope compensation
  • High-performance 1-MHz synchronizable oscillator with internal timing capacitor
  • Precise programmable maximum duty cycle
  • PB-free lead finish package

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.

The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.

The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.
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Documentación técnica

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Tipo Título Fecha
* Data sheet UCC2897A Advanced Current-Mode Active-Clamp PWM Controller datasheet (Rev. G) PDF | HTML 27 ene 2019
Application note Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A) 27 ene 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Application note Slope Compensation Design for UCC2897A 30 oct 2017
Technical article Flyback converters: two outputs are better than one PDF | HTML 24 nov 2016
Technical article Excuse me for being a little forward... with my topology PDF | HTML 21 oct 2015
Application note UCC2897A Peak Current Mode Active Clamp Forward Converter Small Signal Modeling 17 ene 2014
Application note External Slope Compensation for UCC2897A in Some Special Applications 05 ene 2010
Application note Method of Providing Hiccup Operation for UCC2897AEVM 27 ago 2009
EVM User's guide Using the UCC2897AEVM 27 feb 2009
More literature Seminar 1000 Topic 3 - Active Clamp and Reset Technique 15 feb 2001
More literature Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset 15 feb 2001

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

TPS2372-4EVM-006 — Módulo de evaluación TPS2372-4EVM para aplicaciones PD de PoE IEEE802.3bt

The TPS2372 evaluation module (TPS2372-4EVM-006) contains evaluation and reference circuitry for the TPS2372, which is a IEEE802.3bt PoE PD controller suitable for high power PoE PD applications such as LED lighting and modules.

In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23880.

Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

TPS2373-4EVM-758 — Módulo de evaluación TPS2373-4 para aplicaciones PD de PoE IEEE802.3bt

The TPS2373 evaluation module (TPS2373-4EVM-758) contains evaluation and reference circuitry for the TPS2373, which is a IEEE802.3bt PoE PD controller suitable for high power PoE PD applications. The EVM is designed with a 5V active clamp forward isolated converter for high efficiency, 70W PD (...)

Guía del usuario: PDF | HTML
No disponible en TI.com
Placa de evaluación

UCC2897AEVM — Módulo de evaluación UCC2897A

The UCC2897A evaluation module (EVM) is an active clamp reset forward converter providing a 3.3-V regulated output at 30 A of load current, operating from a 48-V input. The design operates over the full 36-V to 72-V telecom input range, and is able to fully regulate down to zero load current. The (...)

Guía del usuario: PDF
No disponible en TI.com
Modelo de simulación

UCC2897A PSpice Transient Model

SLUM429.ZIP (122 KB) - PSpice Model
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Modelo de simulación

UCC2897A TINA-TI Startup Transient Reference Design

SLUM605.TSC (5104 KB) - TINA-TI Reference Design
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Modelo de simulación

UCC2897A TINA-TI Steady State Transient Reference Design

SLUM606.TSC (2323 KB) - TINA-TI Reference Design
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Modelo de simulación

UCC2897A TINA-TI Transient Spice Model

SLUM604.ZIP (43 KB) - TINA-TI Spice Model
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Herramienta de cálculo

SLUC662 — UCC2897A Design Calculator

Productos y hardware compatibles

Productos y hardware compatibles

Productos
AC/DC & DC/DC controllers (external FET)
UCC2897A — Controlador PWM de 110 V con modo de corriente de pinza activa y protección FET de pinza de canal P
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TSSOP (PW) 20 Ver opciones
VQFN (RGP) 20 Ver opciones
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Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

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